Memory Days is the third OVA for the Fairy Tail series by Hiro Mashima. It was bundled along with the Special Edition of Volume 31 of the Manga, which was first released on February 17, 2012. Natsu, Lucy, Gray, Erza and Happy are sent to the past by the mysterious Magic book, Memory Days. During their adventure, the group tries to avoid coming into contact with the people, afraid that they may affect the future. However, the group finds that their actions subsequently led to Natsu's scar and Lucy joining Fairy Tail.